Re: [Boost-users] [asio] serial_port question

26 Aug 2009


      Whoops ... forgot to start the read again in the completion handler.
"Fixed" below.

Michael Caisse wrote:
...
void my_message_maker::read_start()
{
  serial_port.async_read_some( boost::asio::buffer( in_message, 
MAX_MESSAGE_SIZE ),
                               boost::bind( &my_message_maker::read_done,
                                            this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred ) );
}
void my_message_maker::read_done( const boost::system::error_code& error,
                                 int bytes_transferred )
{
  if( !error )
  {
     for( int i=0; i < bytes_transferred; ++i )
     {
        if( in_message[ i ] == STX )
        {
           my_message.clear();
        }
        else if( in_message[ i ] == ETX )
        {
           make_callback( my_message );
        }
        else
        {
           my_message += in_message[ i ];
        }
read_start();
       }
...
}
  else
  {
     close_port( error );
  }
}
-- 

----------------------------------
Michael Caisse
Object Modeling Designs
www.objectmodelingdesigns.com